Window lock



1,491,538 Aprl] A. KING WINDOW LOCK Filed March 10. 1921 l 'atented Apr. 22, 1924.

ARMIN KING, 01F NEW YORK, N. Y., ASSTGNGR G ONE-THIRD T0 SIMON DANIEL, ONE- TI-IIRD TO HERMAN DANIEL, AND ONE-THIRD T0 JACK (i-HUBER, ALL 6F NEW YORK, it. Y.

WINDOVJ LOCK.

Application filed March 16,1821. Serial No. 451,278.

To (ZZZ 10.1 23 may concern Be it known that 1, Armin KING, a citizen of the Republic of Hungary, and resident of New York, in the county of New York and of New York, have invented certain new and useful improvements in Vindow Locks, of which the following is a specification. V

This invention is an improveddevice for locking windows to permit a limited opening thereof, and is particularly adapted for use with'the ordinary type of window having upper and lower sliding sashes. My improved construction is such that it may be secured to the window casing independent of either sash, and may be so positioned that the extent to which one sash may be opened is independent of the extent to which the other sash may be opened. The device is simple in construction, inexpensive to manufacture, and easily attached without making any changes or alterations in the casing or sashes. The attaching does not require any special tools other than an ordinary screw driver, and does not require the services of a skilled mechanic.

In the accompanying drawings illustrating one embodiment,

Figure 1 is a front elevation of a portion of a window with the device in position,

Figure 2 is a View of the same portion taken in a vertical plane at right angles to the plane of the window,

Figure 3 is a plan view in a horizontal plane at right angles to the plane of the window,- and Figures a and 5 are details.

I have illustrated my invention in connection with an ordinary window, including a window casing 10 serving to slidably support upper and lower window sashes 11 and 12. The construction of the casing and sashes forms no portion of my invention, and I do not wish to be limited in any way to the specific construction illustrated. They are shown merely to facilitate a clear understanding of the operation and purpose of my improved device. This device, in the form illustrated, includes a member 13 in the form of a bar adapted to be secured to the window casing and project in a direction substantially at right angles to the plane of the window, and above the lower sash. For securing this member to the window casing T have shown a bracket plate 14 adapted to be secured to the casing by ordinary screws, or in any other suitable manner. This bracket plate 1% has a stud 15 extending through a slot 16 in the member 13. This stud has upper and lower parallel faces en gaging with opposite sides of the slot, so as to normally prevent the rotation of the bar 13 about the stud as a pivot. The slot is of approximately hey-hole form, that is, it has an enlarged portion-at one end so that when the bar is moved toward the left to the extreme position from that shown in Figure 2, the bar may be freely rotated about the stud as a pivot and'to the position shown in dotted lines in FigureQ. The stud 15 also serves to support a clamping device which is shown as a set-screw 17 threaded into the; stud and having a head of such character that the set-screw may be readily turned by hand to clamp or unclamp the bar 13. The set screw may have a flanged Y portion for engaging with the outer surface of the bar to clamp the latter against the bracket plate 14,0r a washer 18 may beinterposed to serve this purpose.

The bar 13 at its opposite end is provided with a head or flanged portion 19, adapted to be disposed closely adjacent to the inner surface of the upper sash. Preferably this head or flanged portion 19 has a vertically disposed dove-tail groove in its surface, and

the upper sash is provided with a member 20' undercut so as to enter this dove-tail groove and lit the same as shown'in Figure 4a. The upper end of the member 20 constitutes a head or is provided with a flange or stop portion 21, so as to limit the. downward movement of the member 20 through the slot in the portion 19.; v

Although the form of the stud 15 and its engagement in the slot 16 will serve to prevent rotation of thebar 13, Ixpreferably provide additional means for preventing such rotatiorn As shown, the bracket plate 14: has an outwardly extending flange 22 for engagement with the under side of the bar 13, at a point disposed some distance along the bar'13 from the stud 15, and the bar 13 is provided with a flange 23 for engagement with the upper surface of. a projection 24 on the bracket plate 14: at the otherv side of the stud. Thus, upward or downward swinging of the free end of the bar 13 is positively prevented when the parts are in the position illustrated in Figure 2. When the set screw 17 is loosened and the bar is moved to the left, the flange 23 will pass beyond the surface of the projection 24;, and the bar 13 will be free to swing counter-clockwise from the position shown in Figure 2, through approximately 90 degrees, when the stud enters the enlargement at the end of the slot.

The bar 13 extends across the upper surface of the lower sash and thus limits the stent to which the lower sash may be aised. The bracket plate 14; may be secured at any point vertically disposed along the window casing, so that the purchaser may set his own limit for the desired extent of opening of the lower sash. After the positioning of the bar 13 as shown in Figure 2, the member 20 is secured to the upper sash at any desired distance above the member 13. Here again the purchaser may install the member at any desired position so as to limit the downward movement or opening of the upper sash. As the upper sash is lowered, the member 20 enters the dove-tail slot in the part 19 until the head 21 engageswith the upper surface of the part 19. Further downward movement of the upper sash is prevented, and furthermore, the tilting or swinging of the bar 13 is prevented not only by its engagement with coacting portions on the bracket plate let, but also by the dove-tail engagement with the member 20. If desired, the members 1 1 and 20 may be so mounted in. respect to each other and in respect to the lower sash, that any opening movement of either sash is prevented, or either sash may be openable to a limited extent while preventing any movement of the other. The lower sash engages with the bar 13 closer to the support of the latter than does the upper sash, so that any force exerted on the lower sash will apply comparatively short leverage and little strain upon the bar 13.

My improved device is particularly useful where it is desired to prevent the opening of the window from the outside, but leaving sufiicient opening for ventilation purposes, and may also beused where it is desired to prevent small children from opening windows sufficiently far to permit them to fall out. It will be noted that the device does not intereitere in any way with the usual window lock with which the window may be provided.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A device for limiting the opening movement of double sash windows, including a bracket adapted to be secured to the window casing above the lower sash, but at one side of the plane thereof, a bar pivotally mounted on said bracket and adapted to extend in a substantially horizontal direc tion across the plane of the lower sash, said bar presenting a dove-tail groove at its ere tremity and a member adapted to be secured to the upper sash, and having a dove-tail portion adapted to enter said groove and a stop portion for engagement with the upper side of said first mentioned member when said upper sash is lowered to a predetermined point.

2. A device for limiting the opening movement of double sash windows, including a bracket adapted to be secured to the window casing at a point spaced above the lower sash but at one side of the path of movement thereof, a bar pivotally mounted on said bracket, means for locking said bar in a horizontal position above and in the path of movement of the lower sash whereby the upward movement of the lower sash is limited, and a member secured to the upper sash above said bar and adapted to engage with the latter after a limited downward opening movement of the upper sash to prevent further opening movement.

3. A device for limiting the opening movement of double sash windows, including a bracket adapted to be secured to the window casing at a point spaced above the lower sash but at one side of the path of movement thereof, a bar pivotally mounted on said bracket, means associated with said pivotal connection for preventing the bar from swinging downwardly past a horiZon-. tal position with one end above and in the path of movement of the lower sash and permitting sliding movement of the upper sash, and a member secured to the upper sash for engagement with said bar to limit said sliding movement of the upper sash.

Signed at New York, in the county of New York and State of New York, this 5th day of March A. D. 1921.

. ARMIN KING. 

